Gremlin widget following the current tool location

Hi,
I would like to be able to have the preview of a gremlin widget part of a glade project that follows at any time the tool position.
In other word the preview should be centered on the current tool location. Is that possible?

Before doing it on a continuous way, I have set up a button for development and maybe final use, which runs the command once clicked, so it "recenter" the preview.. I have been trying some commands in the associated python file related to the gremlin:

def on_hal_Center_clicked(self, widget, data=None):
self.gremlin.set_mouse_start(0,0)
self.gremlin.pan(-self.status.actual_position[0],-self.status.actual_position[1])
but this does not actually work as I would expect. The view is moving, but in an expected location and cannot work the pattern to find out how the coordinates should be entered.

Anyone would be able to explain a bit more the coordinates system used for the set_mouse_start and pan command. Can those coordinates be actually based on the physical coordinates of the tool?

I have also been looking at the pydoc gremlin without finding anything obvious method that could be used appart from
self.gremlin.set_centerpoint(1000,1000,100)
self.gremlin.set_eyepoint(0)
But again this does not give me an expected results.

Thank you for your help,

Nicolas

Hi,
would anyone have more information about how to use:
[widget name].set_mouse_start(0,0)
[widget name].rotate_view(x,y)
[widget name].pan(x,y)

Thank you,
Nicolas

These function are found in src/emc/usr_intf/gremlin.py

They call functions found in lib/python/glnav

I don't know how to translate mouse/screen position to linuxcnc coordinate system
Do I understand right - you want the tool to stay in center and the program 'body' move around it?

Chris M

Yeah, that is the idea, the tool would remain at any time in the center of the gremlin display and the program 'body' move around it.